The fifth edition of the Chicago Architecture Biennial, CAB 5: This is a Rehearsal, curated by the interdisciplinary arts collective the Floating Museum, takes an expansive view of design as an iterative rehearsal process to explore architecture, cities, and the different social, ecological, economic and political forces that shape them. From artists, architects, engineers, performers, poets, and others, the practitioners represented in CAB 5 collectively set the stage for the cross-pollination of ideas in order to challenge and envision alternatives for the following: how we understand and address the needs of a city, who plays a role in imagining and making the city, and how our potential solutions attend to the overlapping crises that now inform our everyday lives.